Unusual superconducting behavior in HfV2Ga4
Physics Letters(2018)
摘要
Bulk superconductivity in HfV2Ga4 with critical temperature close to 4.1 K was determined via magnetic susceptibility, electrical resistivity and specific heat measurements. Both the upper and lower critical field dependence with reduced temperature ( T / T c ) exhibit non-conventional behavior. The electronic component of specific heat shows a double-jump, the first close to T c and the other close to 0.75 T c . We speculate about the nature of the douple jump observed in specific heat considering two plausable scenarios: bulk inhomogeneities and the existence of a second gap.
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